<!DOCTYPE html>
<html lang="en">
<head>
    <meta charset="UTF-8">
    <meta name="viewport" content="width=device-width, initial-scale=1.0">
    <title>Document</title>
</head>
<body>
    <script>
        let obj = {
            'name' :'张三',
            age :10
        }
        // 产生的是相同的symbol、
        let ss = Symbol.for("name")
        let ss2 = Symbol.for("name")
        let ss3 = Symbol("name")
        console.log(ss == ss3);
    </script>
</body>
</html>